Hydroquinone is a carcinogenic skin whitener???

In 2006, the U.S. Food and Drug Administration proposed a ban on over-the-counter sales of skin-lightening products, citing potential health risks of the common ingredient hydroquinone.

Hydroquinone is a possible carcinogen and has been linked with disfiguring condition called ochronosis that causes darkening and thickening of the skin, along with raised bumps and greyish-brown spots.

???? Does anyone know if this applies to developers ????

Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.

A skin lightener that causes darkening of the skin would be the sort of thing that some bureaucrat might try to ban. It has, of course many uses but so does sodium hydroxide.

My first contact with hydroquinone was about 68 years ago. So far, my most serious ailment has been old age, followed by conkus of the bonkus: everything I eat turns to excrement and comes out my anus.

In 2006, the U.S. Food and Drug Administration proposed a ban on over-the-counter sales of skin-lightening products, citing potential health risks of the common ingredient hydroquinone.

Hydroquinone is a possible carcinogen and has been linked with disfiguring condition called ochronosis that causes darkening and thickening of the skin, along with raised bumps and greyish-brown spots.

???? Does anyone know if this applies to developers ????

It does not apply.

You should always practice chemical safety when working with any chemical reagent. (This includes water).

No, I was thinking quinoline, which is basically a benzene and a pyridine stuck together, as I'm sure you know. And then quinolones (parent group is basically nalidixic acid), which looks like two pyridines stuck together, with one of them pretty heavily oxidized and other one methylated.

People tend to forget it, but hyrdoquinone is in the same class of toxic chemicals as pyro. Don't sniff that powder, it won't do you good.

Using film since before it was hip.

"One of the most singular characters of the hyposulphites, is the property their solutions possess of dissolving muriate of silver and retaining it in considerable quantity in permanent solution" — Sir John Frederick William Herschel, "On the Hyposulphurous Acid and its Compounds." The Edinburgh Philosophical Journal, Vol. 1 (8 Jan. 1819): 8-29. p. 11